In the original Miller—Urey experiment it was assumed that carbon and nitrogen in the early atmosphere were present as
A) carbon dioxide (CO2 ) and nitrogen (N2)
B) carbonates (CO3-) and nitrates (NO3-)
C) methane (CH4 ) and ammonia (NH3)
D) carbon and nitrogen atoms
C
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An electron is moving at 
m/s at an angle of 40
to a 0.80 T magnetic field. What is the magnitude of the acceleration of the electron?
A. 
B. 
C. 
D. 
E. 
Consider a two-slit interference experiment like the one shown in figure Q3.7b. The distance between adjacent bright spots in the interference pattern on the screen (A) increases, (B) decreases, or (C) remains the same if, The spacing between the slits increases.
A. increases B. decreases C. remains the same
A 4.0-cm-tall object is placed 50.0 cm from a diverging lens having a focal length of magnitude 25.0 cm. What is the nature and location of the image?
A) a real image, 4.0 cm tall, 20 cm other side of the object B) a virtual image, 4.0 cm tall, 20 cm other side of the object C) a virtual image, 2.0 cm tall, 10 cm other side of the object D) a virtual image, 1.3 cm tall, 16.7 cm same side as the object E) a real image, 1.3 cm tall, 16.7 cm same side as the object
We do not yet know when (in what year) the maximum amount of crude oil produced per year worldwide will occur
What will be an ideal response?